[INFO] cloning repository https://github.com/fsyncd/tokio-vsock
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fsyncd/tokio-vsock" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffsyncd%2Ftokio-vsock", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffsyncd%2Ftokio-vsock'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43c47ac0ff0b35e929a38b866cbaf90786c82bb0
[INFO] documenting fsyncd/tokio-vsock against beta-2021-09-08 for beta-1.56-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffsyncd%2Ftokio-vsock" "/workspace/builds/worker-111/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-111/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fsyncd/tokio-vsock on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-111/source/.cargo/config
[INFO] started tweaking git repo https://github.com/fsyncd/tokio-vsock
[INFO] finished tweaking git repo https://github.com/fsyncd/tokio-vsock
[INFO] tweaked toml for git repo https://github.com/fsyncd/tokio-vsock written to /workspace/builds/worker-111/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Downloading crates ...
[INFO] [stderr] warning: spurious network error (2 tries remaining): [35] SSL connect error (OpenSSL SSL_connect: Connection reset by peer in connection to crates.io:443 )
[INFO] [stderr] Downloaded vsock v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 948a2640c27163e7b5e8c7e68ebb733864b0f44fe6ae2ba9f1d913c1679c1c9d
[INFO] running `Command { std: "docker" "start" "-a" "948a2640c27163e7b5e8c7e68ebb733864b0f44fe6ae2ba9f1d913c1679c1c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "948a2640c27163e7b5e8c7e68ebb733864b0f44fe6ae2ba9f1d913c1679c1c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "948a2640c27163e7b5e8c7e68ebb733864b0f44fe6ae2ba9f1d913c1679c1c9d", kill_on_drop: false }`
[INFO] [stdout] 948a2640c27163e7b5e8c7e68ebb733864b0f44fe6ae2ba9f1d913c1679c1c9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 805cda69976511a5874b0d92615dae9ddf4fd5bd1ecdf3b94ea84656706936f9
[INFO] running `Command { std: "docker" "start" "-a" "805cda69976511a5874b0d92615dae9ddf4fd5bd1ecdf3b94ea84656706936f9", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Compiling autocfg v1.0.1
[INFO] [stderr] Compiling proc-macro2 v1.0.29
[INFO] [stderr] Compiling unicode-xid v0.2.2
[INFO] [stderr] Compiling syn v1.0.76
[INFO] [stderr] Compiling libc v0.2.101
[INFO] [stderr] Compiling proc-macro-hack v0.5.19
[INFO] [stderr] Compiling memchr v2.4.1
[INFO] [stderr] Compiling futures-core v0.3.17
[INFO] [stderr] Compiling futures-task v0.3.17
[INFO] [stderr] Compiling proc-macro-nested v0.1.7
[INFO] [stderr] Compiling futures-channel v0.3.17
[INFO] [stderr] Compiling log v0.4.14
[INFO] [stderr] Checking futures-sink v0.3.17
[INFO] [stderr] Checking pin-project-lite v0.2.7
[INFO] [stderr] Checking pin-utils v0.1.0
[INFO] [stderr] Checking slab v0.4.4
[INFO] [stderr] Checking futures-io v0.3.17
[INFO] [stderr] Checking bitflags v1.3.2
[INFO] [stderr] Checking bytes v1.1.0
[INFO] [stderr] Compiling futures-macro v0.3.17
[INFO] [stderr] Compiling futures-util v0.3.17
[INFO] [stderr] Compiling tokio v1.11.0
[INFO] [stderr] Compiling quote v1.0.9
[INFO] [stderr] Checking mio v0.7.13
[INFO] [stderr] Checking nix v0.19.1
[INFO] [stderr] Checking iovec v0.1.4
[INFO] [stderr] Checking bytes v0.4.12
[INFO] [stderr] Checking vsock v0.2.4
[INFO] [stderr] Compiling tokio-macros v1.3.0
[INFO] [stderr] Checking futures-executor v0.3.17
[INFO] [stderr] Checking futures v0.3.17
[INFO] [stderr] Documenting tokio-vsock v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] thread 'rustc' panicked at 'index out of bounds: the len is 43 but the index is 43', compiler/rustc_metadata/src/creader.rs:146:21
[INFO] [stderr] stack backtrace:
[INFO] [stderr] 0: 0x7f2d9329c4fc - std::backtrace_rs::backtrace::libunwind::trace::h51faa62df48810e4
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr] 1: 0x7f2d9329c4fc - std::backtrace_rs::backtrace::trace_unsynchronized::h91de4d8e16d607e4
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr] 2: 0x7f2d9329c4fc - std::sys_common::backtrace::_print_fmt::h71b0935f97e4322c
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr] 3: 0x7f2d9329c4fc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9a78218788c14e18
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr] 4: 0x7f2d932fa20c - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/core/src/fmt/mod.rs:1150:17
[INFO] [stderr] 5: 0x7f2d9328d435 - std::io::Write::write_fmt::h1d5220480c7a2437
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/io/mod.rs:1667:15
[INFO] [stderr] 6: 0x7f2d9329fa60 - std::sys_common::backtrace::_print::h4b77abc4d907ed0e
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr] 7: 0x7f2d9329fa60 - std::sys_common::backtrace::print::hb170c60b542377ad
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr] 8: 0x7f2d9329fa60 - std::panicking::default_hook::{{closure}}::h12bbda9af8901ee3
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/panicking.rs:210:50
[INFO] [stderr] 9: 0x7f2d9329f617 - std::panicking::default_hook::h8c6c66d3f3ba6768
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/panicking.rs:227:9
[INFO] [stderr] 10: 0x7f2d93a73861 - rustc_driver::DEFAULT_HOOK::{{closure}}::{{closure}}::h5d5f6bcd40777e95
[INFO] [stderr] 11: 0x7f2d932a0279 - std::panicking::rust_panic_with_hook::h36f2fa0bb09f4069
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/panicking.rs:628:17
[INFO] [stderr] 12: 0x7f2d9329fd30 - std::panicking::begin_panic_handler::{{closure}}::h9c42b65a42d06a7a
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/panicking.rs:521:13
[INFO] [stderr] 13: 0x7f2d9329c9c4 - std::sys_common::backtrace::__rust_end_short_backtrace::hc791bddfe31e532c
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr] 14: 0x7f2d9329fc99 - rust_begin_unwind
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/panicking.rs:517:5
[INFO] [stderr] 15: 0x7f2d93265891 - core::panicking::panic_fmt::hf9de31d4acbce4db
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/core/src/panicking.rs:101:14
[INFO] [stderr] 16: 0x7f2d93265852 - core::panicking::panic_bounds_check::hb9e5d22d3b96691f
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/core/src/panicking.rs:77:5
[INFO] [stderr] 17: 0x7f2d95d2a20e - rustc_metadata::rmeta::decoder::cstore_impl::provide_extern::crate_name::h171a3f959c8000a6
[INFO] [stderr] 18: 0x7f2d95aac4d9 - rustc_query_system::query::plumbing::get_query_impl::hd5a2238496fa652f
[INFO] [stderr] 19: 0x7f2d95bf0d36 - <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::crate_name::h85d7de7aa9a969dc
[INFO] [stderr] 20: 0x560775c8459b - rustdoc::clean::inline::record_extern_fqn::h3775e4bde76d4d12
[INFO] [stderr] 21: 0x560775b1a71f - rustdoc::clean::utils::register_res::h9da9342c4626dcc6
[INFO] [stderr] 22: 0x560775ccea3f - rustdoc::passes::collect_intra_doc_links::LinkCollector::resolve_link::hc013331a187b43e5
[INFO] [stderr] 23: 0x560775cc7e61 - <rustdoc::passes::collect_intra_doc_links::LinkCollector as rustdoc::fold::DocFolder>::fold_item::h546bd90450af7abf
[INFO] [stderr] 24: 0x560775b7c071 - alloc::vec::source_iter_marker::<impl alloc::vec::spec_from_iter::SpecFromIter<T,I> for alloc::vec::Vec<T>>::from_iter::h53f056ce468e21a5
[INFO] [stderr] 25: 0x560775cc1748 - rustdoc::passes::collect_intra_doc_links::collect_intra_doc_links::hcccbfa8633c5f7c2
[INFO] [stderr] 26: 0x560775c4da28 - rustdoc::core::run_global_ctxt::h82a31e8b07fe7fca
[INFO] [stderr] 27: 0x560775c21c95 - rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter::h9441b46146f3a377
[INFO] [stderr] 28: 0x560775bd6030 - rustc_span::with_source_map::h17f667a69f76b474
[INFO] [stderr] 29: 0x560775c23dc8 - rustc_interface::interface::create_compiler_and_run::h1aa13efc573ce698
[INFO] [stderr] 30: 0x560775b08a0f - rustdoc::main_options::h92bd5a8e07001280
[INFO] [stderr] 31: 0x560775cdc3e0 - scoped_tls::ScopedKey<T>::set::h1d4f74e85cba8609
[INFO] [stderr] 32: 0x560775bdb087 - std::sys_common::backtrace::__rust_begin_short_backtrace::h36dc97b6ab2715d6
[INFO] [stderr] 33: 0x560775d1b583 - core::ops::function::FnOnce::call_once{{vtable.shim}}::he17aa9db60d1f426
[INFO] [stderr] 34: 0x7f2d932ac8c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbbbb32ef11ea0ad2
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/alloc/src/boxed.rs:1636:9
[INFO] [stderr] 35: 0x7f2d932ac8c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3b8ef23699fc5385
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/alloc/src/boxed.rs:1636:9
[INFO] [stderr] 36: 0x7f2d932ac8c3 - std::sys::unix::thread::Thread::new::thread_start::ha57f5cba35f709b7
[INFO] [stderr] at /rustc/e784c962ea252f0874a4305168077e7048cb39e9/library/std/src/sys/unix/thread.rs:106:17
[INFO] [stderr] 37: 0x7f2d931c4609 - start_thread
[INFO] [stderr] 38: 0x7f2d92f6e293 - clone
[INFO] [stderr] 39: 0x0 - <unknown>
[INFO] [stderr]
[INFO] [stderr] error: internal compiler error: unexpected panic
[INFO] [stderr]
[INFO] [stderr] error: Unrecognized option: 'document-private-items'
[INFO] [stderr]
[INFO] [stderr] error: could not document `tokio-vsock`
[INFO] [stderr]
[INFO] [stderr] Caused by:
[INFO] [stderr] process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name tokio_vsock src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-9674f6884572cd09.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-9cb65a379b23f24d.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-7da8d5d62d4cc846.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-69175b6b267d5021.rmeta --extern vsock=/opt/rustwide/target/debug/deps/libvsock-0e6fabf99000c832.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "805cda69976511a5874b0d92615dae9ddf4fd5bd1ecdf3b94ea84656706936f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "805cda69976511a5874b0d92615dae9ddf4fd5bd1ecdf3b94ea84656706936f9", kill_on_drop: false }`
[INFO] [stdout] 805cda69976511a5874b0d92615dae9ddf4fd5bd1ecdf3b94ea84656706936f9